help hitachi p50t01u psu problem

[remote52]

hi! can anyone help with this fault? psu switches on but no display,when sub power is pressed blue light flickers twice and shuts down and all lights are gone too, checked all caps are ok and soldered psu for dry joints

[mulja]

hi! can anyone help with this fault? psu switches on but no display,when sub power is pressed blue light flickers twice and shuts down and all lights are gone too, checked all caps are ok and soldered psu for dry joints

Hi
normaly y drive boards go faulty then blue light flashing 4 time
try disconect top or bottom drive if tv start with half screen will show picture
then just replace the board